Home / 139,232.26-192,138.42-78,814.36

Finding the Fourth Proportional to 139,232.26, 192,138.42 and 78,814.36

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Solution

The fourth proportional to 139,232.26, 192,138.42 and 78,814.36 is: 108,762.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,232.26 : 192,138.42 = 78,814.36 : x
  2. Step 2: Convert to fraction form
    139,232.26/192,138.42 = 78,814.36/x
  3. Step 3: Cross multiply
    139,232.26x = 192,138.42 × 78,814.36
  4. Step 4: Simplify right side
    139,232.26x = 15,143,266,603.71
  5. Step 5: Solve for x
    x = 15,143,266,603.71/139,232.26
  6. Step 6: Final answer
    x = 108,762.63

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.